Flexible and flame‐retardant S‐SEB‐S triblock copolymer/PPE nano‐alloy |
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| Authors: | Yoshifumi Araki Yukari Hori Katsumi Suzuki Hiroshi Shirai Kiyoo Kato Hiromu Saito |
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| Affiliation: | 1. Asahi Kasei Chemicals Corporation, Kawasaki‐city, Kanagawa, Japan;2. Department of Organic and Polymer Materials Chemistry, Tokyo University of Agriculture and Technology, Tokyo, Japan |
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| Abstract: | We observed that modified polyphenylene ether (PPE) was solubilized in thermoplastic styrenic elastomer (TPS) and that a two‐phase lacy structure formed on nanometer scales when the TPS composition was 67 wt % and modified PPE and polystyrene‐block‐poly(styrene‐co‐ethylene‐co‐butylene)‐block‐polystyrene (S‐SEB‐S triblock copolymer) were blended. However, the molecular weight of the outer PS block segments MoutPS and the content of the outer PS block segments ?outPS were <10,000 g/mol and 20 wt %, respectively. The resulting S‐SEB‐S/modified PPE nano‐alloy exhibited both flexibility and flame retardancy, unlike other materials, where a trade‐off exists between these two properties; that is, the flame retardancy was excellent when the phosphorus additive was present. This combination of properties might be attributed to the two‐phase nanometer‐scale structure consisting of flame‐retardant styrene/PPE domains and a continuous soft, lacy SEB matrix. The results for polystyrene‐block‐poly(ethylene‐co‐butylene)‐block‐polystyrene (S‐EB‐S triblock copolymer)/modified PPE blends were presented for comparison. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 40446. |
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| Keywords: | structure‐property relations blends mechanical properties flame retardance nanostructured polymers |
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